some major improvements. changed to getopt() for flag processing, added -s FUNC suppression set functionality so that you can suppress the automatically generated print_TYPE function (because you've written your own tweaked version)..

datadec-1.3: converted the code (and the code generated) to use stdbool.h throughout, and added code into decs.c to generate a .basename.dd file listing the types, the shapes, and the parameter types per shape.